1RX1	Oxidoreductase	date	Sep 19, 1996
title	Dihydrofolate Reductase (E.C.1.5.1.3) Complexed With Nicotin Adenine Dinucleotide Phosphate (Reduced Form)
authors	M.R.Sawaya
compound		source
Molecule: Dihydrofolate Reductase Chain: A Synonym: Dhfr Ec: 1.5.1.3 Engineered: Yes		Organism_scientific: Escherichia Coli Organism_taxid: 562 Strain: Rt500 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_plasmid: Prwa-1
symmetry	Space Group: P 21 21 21	R_factor 0.180 R_Free NULL
crystal cell	length a length b length c angle alpha angle beta angle gamma 34.455 45.370 98.701 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.00 Å
ligand	CA, NAP	enzyme	Oxidoreductase E.C.1.5.1.3 BRENDA
related structures	by homologous chain: 1RG7, 1RX6
Gene Ontology	Chain Function Process Component A
Primary reference	Loop and subdomain movements in the mechanism of Escherichia coli dihydrofolate reductase: crystallographic evidence., Sawaya MR, Kraut J, Biochemistry 1997 Jan 21;36(3):586-603. PMID:9012674

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (34 Kb) [Save to disk] Biological Unit Coordinates (1rx1.pdb1.gz) 30 Kb LPC: Ligand-Protein Contacts for 1RX1 CSU: Contacts of Structural Units for 1RX1 Likely Quarternary Molecular Structure file(s) for 1RX1 Structure Factors (70 Kb) Retrieve 1RX1 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1RX1 from S2C, [Save to disk] Re-refined 1rx1 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1RX1 in 3D

Proteopedia, because life has more than 2D. On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure. On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.

Visual 3D analysis of 1RX1

Ramachandran plot from PDBSum

Structure-derived information

Electron Density related parameters from EDS Electron Density Server, at Upsala Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1RX1, from MSDmotif at EBI Genome occurence of 1RX1's fold from GeneCensus Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1rx1__, region [Jmol] [rasmolscript] [script source] Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH Summaries and structural analyses of PDB data files from PDBSum Identification of Protein Pockets & Cavities at CASTp

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1rx1_A] [1rx1] SWISS-PROT database: [P0ABQ4] Domain organization of [DYR_ECOLI] by SWISSPFAM

Other resources with information on 1RX1

Community annotation for 1RX1 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

Movements, Movies and Images

Domain movements in 1RX1 from the Database of Macromolecular Movements. Images from IMB Jena Image Library of Biological Macromolecules.

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